[PATCHv2 0/3] watchdog: sama5d4: fix IRQ and timeout bugs, use platform_get_irq_optional

[Nicolas Ferre]

On 08/06/2026 at 13:09, Rosen Penev wrote:
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> This series fixes three issues in the sama5d4 watchdog driver:
> 
> Patch 1: Return IRQ_NONE when the status register indicates no watchdog
> interrupt is pending, and pass the configured timeout (not the hardcoded
> default) to sama5d4_wdt_init().
> 
> Patch 2: Replace irq_of_parse_and_map() with platform_get_irq_optional()
> for simpler error handling and EPROBE_DEFER support.
> 
> Patch 3: Move platform_set_drvdata() before devm_request_irq() to prevent
> a NULL pointer dereference in the interrupt handler if the shared System
> IRQ fires immediately after registration.
> 
> v2: address sashiko review

Rosen,

I'd like to hear how these issues where found and how the patches were 
tested.

Best regards,
   Nicolas

> Rosen Penev (3):
>    watchdog: sama5d4: fix shared IRQ and hardcoded timeout issues
>    watchdog: sama5d4: use platform_get_irq_optional()
>    watchdog: sama5d4: fix NULL deref in irq handler
> 
>   drivers/watchdog/sama5d4_wdt.c | 32 +++++++++++++++++---------------
>   1 file changed, 17 insertions(+), 15 deletions(-)
> 
> --
> 2.54.0
>